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LibWeb: Improve support for 'vertical-align: middle'

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This rebaselines a few table-related layout tests since our default
stylesheet applies 'vertical-align: middle' to a few table-related
elements.
This commit is contained in:
implicitfield 2024-02-28 19:45:25 +04:00 • committed by Tim Flynn
parent 41e0a0f0aa
commit b08fd1b9ae
7 changed files with 55 additions and 20 deletions
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3
Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
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@ -1736,6 +1736,9 @@ CSSPixels FormattingContext::box_baseline(Box const& box) const
case CSS::VerticalAlign::Top:
// Top: Align the top of the aligned subtree with the top of the line box.
return box_state.border_box_top();
case CSS::VerticalAlign::Middle:
// Align the vertical midpoint of the box with the baseline of the parent box plus half the x-height of the parent.
return box_state.content_height() / 2 + CSSPixels::nearest_value_for(box.containing_block()->first_available_font().pixel_metrics().x_height / 2);
case CSS::VerticalAlign::Bottom:
// Bottom: Align the bottom of the aligned subtree with the bottom of the line box.
return box_state.content_height() + box_state.margin_box_top();